Lighting device



FIG. 1 is a front perspective view of a lighting device showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof.

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a front side elevational view thereof; and,

FIG. 8 is a rear side elevational view thereof.

The dashed lines in FIGS. 1-8 are shown for illustrative purposes and form no part of the claimed design. 

The ornamental design for a lighting device, as shown and described. 